JP6550249B2 - Stirring blade, stirrer using the same, washing machine - Google Patents

Description

  The present invention relates to a stirring blade for stirring a fluid, a stirring device using the same, and a washing machine.

  BACKGROUND Conventionally, as a stirring blade, there is a blade having a blade portion serving to stir a fluid by rotation (see, for example, JP-A-2007-007091 (Patent Document 1)).

  The stirring blade of the structure which has such a blade | wing part is used for the washing machine which wash | cleans the laundry.

Japanese Patent Application Publication No. 2007-007091

  By the way, in the stirring blade having the above-mentioned blade portion, there has been proposed a prior art in which the frictional resistance is reduced by providing unevenness on the surface of the blade portion in the direction perpendicular to the flow.

  However, the stirring blade provided on the surface of the blade with irregularities for reducing the above-mentioned frictional resistance separates the fluid flow from the axial maximum height position of the blade (or raised portion), so the power of the motor There is a problem that the water can not be sufficiently transmitted to the motor and a strong water flow can not be given to the electric power supplied to the motor.

  For this reason, the washing machine using such a stirring blade had the problem that the cleaning power was low. In the washing machine, even if the power is increased to increase the stirring power and the accompanying cleaning power and the stirring blade is rotated, the flow is separated, so the loss increases and the water flow is further increased. It can not strengthen and can not improve the cleaning power.

  Then, the subject of this invention is providing the stirring blade which can stir the to-be-stirred thing which gets into the flow in a fluid more strongly by strengthening the flow of a fluid by easy structure.

In order to solve the above-mentioned subject, the stirring blade of this invention is
An impeller having at least one surface disposed in an axially protruding blade portion and a recess circumferentially adjacent to the blade portion, and agitating fluid by rotation.
It has a plurality of protrusions which are provided on the blade portion so as to be spaced apart in the radial direction and which the fluid collides with,
In the plurality of protrusions, the distance between the adjacent protrusions is gradually narrowed from the inner side in the radial direction toward the outer side in the radial direction.

Moreover, the stirring blade of this invention is
An impeller having at least one surface disposed in an axially protruding blade portion and a recess circumferentially adjacent to the blade portion, and agitating fluid by rotation.
It has a plurality of protrusions which are provided on the blade portion so as to be spaced apart in the radial direction and which the fluid collides with,
In the plurality of protrusions, the size of the protrusions gradually decreases from the inner side in the radial direction toward the outer side in the radial direction.
Moreover, in the stirring blade of one embodiment,
The plurality of projections are arranged at intervals in the radial direction on rising wall surfaces that are closer to the front edge side in the rotational direction from the maximum height position of the blades.

Moreover, in the stirring blade of one embodiment,
An agitation blade for agitating the fluid by reverse rotation.
The plurality of protrusions are provided on one of the front edge side or the rear edge side of the normal rotation direction of the blade.

Moreover, in the stirring blade of one embodiment,
The blade portion is one or a plurality of raised portions disposed on at least one surface and protruding in the axial direction,
The plurality of protrusions are provided on a ridge line extending in the radial direction of the protrusion.

Moreover, in the stirring blade of one embodiment,
A fluid flow generator is provided at a central portion of the stirring blade, and generates a fluid flow in the vertical direction by rotating integrally with the stirring blade.

Moreover, the stirring apparatus of this invention is
The above-mentioned stirring blade,
The stirring blade is rotatably disposed, and is provided with a stirring tank in which the fluid is stored.

Moreover, the washing machine of this invention is
It is characterized in that the above-mentioned stirring device is provided.

  As apparent from the above, according to the present invention, by strengthening the flow of fluid with a simple configuration, it is possible to use a stirring blade capable of strongly stirring an object to be stirred that is entrained in the flow in the fluid. It is possible to realize a stirring device and a washing machine that have been used.

FIG. 1 is a longitudinal sectional view of a washing machine using a stirring blade according to a first embodiment of the present invention. FIG. 2 is a perspective view of the stirring blade. FIG. 3 is a top view of the stirring blade. FIG. 4 is a longitudinal sectional view seen from the IV-IV line of FIG. FIG. 5 is a longitudinal sectional view seen from the V-V line of FIG. FIG. 6 is a view for explaining the water flow by the rotation of the stirring blade. FIG. 7 is a schematic view showing the water flow generated in the stirring tank of the washing machine. FIG. 8 is a top view of a stirrer according to a second embodiment of the present invention. FIG. 9 is a perspective view showing a modified example of the stirring blade of the second embodiment. FIG. 10 is a perspective view of a stirrer according to a third embodiment of the present invention. FIG. 11 is a perspective view of a stirring blade according to a fourth embodiment of the present invention. FIG. 12 is an exploded perspective view of a stirrer according to a fifth embodiment of the present invention. FIG. 13 is a perspective view of the screw of the stirring blade as viewed obliquely from above. FIG. 14 is a perspective view of the screw of the stirring blade as viewed obliquely from below. FIG. 15 is a perspective view of the protective cover of the stirring blade as viewed obliquely from above. FIG. 16 is a top view of the stirring blade. FIG. 17 is a longitudinal sectional view seen from line XVII-XVII in FIG. FIG. 18 is a perspective view of the stirring blade. FIG. 19 is a top view of the stirring blade with the protective cover removed. FIG. 20 is a side view of the stirring blade. FIG. 21 is a back view of the stirring blade. FIG. 22 is a top view of the stirring blade with the protective cover and screw removed. FIG. 23 is a view for explaining a water flow when the stirring blade is rotated clockwise as viewed from above. FIG. 24 is a view for explaining water flow when the stirring blade is rotated counterclockwise as viewed from above. FIG. 25 is a top view of a stirrer according to a sixth embodiment of the present invention. FIG. 26 is a perspective view of the screw of the stirring blade as viewed obliquely from above. FIG. 27 is a side view of the main part including the screw. FIG. 28 is a schematic view showing a longitudinal vortex generated by the blade of the screw. FIG. 29 is a top view of a stirrer according to a seventh embodiment of the present invention. FIG. 30 is a graph showing the relationship between the ratio occupied by the screw in the evaluation of the cleaning performance and the ratio of the cleaning rate. FIG. 31 is a table showing the ratio of the washing rate to the washing rate at 0.5 kg of laundry. FIG. 32 is a table showing the ratio of the washing ratio to the washing ratio at 4.5 kg of laundry.

  Hereinafter, the stirring blade of the present invention, a stirring device using the same, and a washing machine will be described in detail by the illustrated embodiments.

First Embodiment
FIG. 1 is a longitudinal sectional view of a washing machine 1 using a stirring blade 100 according to a first embodiment of the present invention.

  As shown in FIG. 1, the washing machine 1 according to the first embodiment is of a fully automatic type, and includes an outer case 10 made of metal or synthetic resin. The outer case 10 is formed in a rectangular parallelepiped shape, and the upper surface and the bottom surface are openings. An upper surface plate 11 made of synthetic resin and provided with an operation panel and the like is fixed to an upper surface opening of the outer case 10. Further, a base 12 made of synthetic resin is fixed to the bottom opening of the outer case 10 with a screw (not shown). At the four corners of the base 12, legs 13 for supporting the outer box 10 on the floor are provided.

  The upper surface plate 11 is provided with a laundry inlet 14 for inserting a laundry (an example of an object to be stirred) into the washing machine 1. The upper cover 15 is rotatably attached to the upper surface plate 11 by a horizontal rotation shaft on the heel side of the washing machine 1. The upper lid 15 is pivoted up and down toward the front side to open and close the laundry inlet 14 so that the laundry can be thrown into the stirring tank 30 housed in the outer box 10 or the laundry can be washed from the stirring tank 30. It can be taken out.

  Inside the outer case 10, a stirring tank 30 and a water tank 20 for housing the stirring tank 30 are accommodated. The stirring tank 30 stores washing water such as water in which detergent is dissolved or water for rinsing. Each of the water tank 20 and the stirring tank 30 is in the form of a bottomed cylindrical cup whose upper surface is open, and each axis is vertical, the water tank 20 is outside, and the stirring tank 30 is inside. Be placed. The wash water is an example of a fluid.

  The water tank 20 is suspended from the outer case 10 by a suspension member (not shown). The suspension members are disposed at a total of four locations so as to connect the lower portion of the outer surface of the water tank 20 and the inner surface corner portion of the outer case 10. The water tank 20 is supported so as to be able to swing within the horizontal portion by this suspension member.

  The stirring tank 30 has a peripheral wall 30b that tapers upward from the bottom wall 30a. A plurality of dewatering holes 31 are annularly arranged at the top of the peripheral wall 30b. The peripheral wall 30 b has no opening for passing the liquid except for the plurality of dewatering holes 31. That is, the stirring tank 30 is a so-called "holeless" type.

  In the following description of the embodiment, the “no-pore” type stirring tank 30 will be described as an example, but the configuration of the present invention can be implemented as it is even in a perforated type stirring tank.

  Further, at the edge of the upper opening of the stirring tank 30, an annular balancer 32 is mounted which functions to suppress vibration when the stirring tank 30 is rotated at a high speed in order to dewater the laundry. On the inner bottom surface of the agitating tank 30, an agitating blade 100 for rotating the washing water in the tank is rotatably disposed.

  The drive unit 40 is attached to the lower surface of the water tank 20. The drive unit 40 includes a motor 41, a belt mechanism 42 for transmitting a rotational output of the motor 41, and a clutch / brake mechanism 43, and a dewatering shaft 44 and a stirring blade shaft 45 coaxially arranged from the central portion thereof. Protrudes upward. The dewatering shaft 44 and the stirring blade shaft 45 have a double shaft structure in which the dewatering shaft 44 is disposed outside and the stirring blade shaft 45 is disposed inside. The dewatering shaft 44 penetrates the bottom of the water tank 20 from the bottom to the top, and supports the stirring tank 30. The stirring blade shaft 45 penetrates the water tank 20 from the bottom to the top and further penetrates the bottom wall 30 a of the stirring tank 30 to support the stirring blade 100.

  The stirring blade 100 performs rotation of 55 to 300 rpm to perform washing or rinsing. Moreover, at the time of dewatering, it spins at 0-1200 rpm together with the stirring tank 30, and dewaters. Seal members for preventing water leakage are disposed between the dewatering shaft 44 and the water tank 20 and between the dewatering shaft 44 and the stirring blade shaft 45, respectively.

  A water supply valve (not shown) that opens and closes electromagnetically is disposed in the space in the top plate 11. A water supply hose (not shown) for supplying clean water such as tap water is connected to a connection pipe 51 connected to the upstream side of the water supply valve and protruding upward through the upper surface plate 11. Further, the downstream side of the water supply valve is connected to a container-like water supply port (not shown) disposed at a position facing the inside of the stirring tank 30.

  Further, a control unit 70 is provided in the upper surface plate 11. The control unit 70 receives an operation command from the user through an operation display unit (not shown) provided on the upper surface of the upper surface plate 11, and issues operation commands to the drive unit 40, the water supply valve and the drain valve 68. Further, the control unit 70 issues, to the operation display unit, a display instruction of the operation content such as the operation course and the required time of each process.

  At the bottom of the water tank 20, a drainage hose 60 for draining the water in the water tank 20 and the stirring tank 30 to the outside of the outer case 10 is attached. Water flows into the drainage hose 60 from a drainage port 61 opened at the bottom of the water tank 20. The water discharged to the outside of the stirring tank 30 at the time of dewatering is flowed to the drainage hose 60 via a water distribution pipe (not shown).

  In addition, a packing (not shown) is sandwiched between the stirring tank 30 and the water tank 20 to prevent water leakage from the center. A seal holder 63 is attached to the center of the bottom of the water tank 20. A drainage path is formed between the seal holder 63 and the water tank 20 including the drainage port 61. The drainage hole 67 is provided in four places on the circumference at the bottom part of the stirring tank 30, and the drainage hole 67 leads the water inside the stirring tank 30 to the drainage valve 68 which opens and closes electromagnetically from the drainage port 61. An oil seal (not shown) is press-fit into the seal holder 63 on the inside. The oil seal seals the agitating tank 30 so that the agitating tank 30 is rotatable and has a watertight structure, and an independent drainage space 66 is formed between the water tank 20 and the agitating tank 30.

  Due to the structure of the washing machine 1, the water in the stirring tank 30 is stopped by the drain valve 68 at the time of washing when the stirring blade 100 rotates, and the water is stored only in the stirring tank 30. At this time, water is not stored between the stirring tank 30 and the water tank 20. This achieves high water conservation during washing. When dewatering is performed, the drain valve 68 is opened, and the water in the stirring tank 30 is drained to the outside. At this time, although the dewatering shaft 44, the stirring blade shaft 45 and the stirring tank 30 are rotated by the drive of the motor 41, the stirring tank 30 and the seal holder 63 can keep relative rotation and keep the watertight structure by the oil seal.

  The stirring blade 100 and the stirring tank 30 constitute a stirring device.

  Next, the stirring blade 100 will be described.

  FIG. 2 shows a perspective view of the stirring blade 100. As shown in FIG. 2, the agitating blade 100 is in the shape of a disc having a diameter of 400 mm, and is formed in a tray shape which becomes deeper toward the center with respect to the peripheral portion 100a. On the surface of the agitating blade 100, a blade portion 110 and a blade portion 120 which are alternately arranged in the circumferential direction radially at a central angle of 90 ° are formed to protrude. Further, four concave portions 102 adjacent to the blade portions 110 and 120 in the circumferential direction are provided. The diameter of the stirring blade 100 may be appropriately set according to the configuration of the washing machine 1 or the like.

  The two blade portions 110 are point-symmetrical with respect to the rotation center, and have a shape in which the vicinity of the middle between the inner periphery and the outer periphery in the radial direction bulges upward most. On the other hand, the two blade portions 120 are point-symmetrical with respect to the rotation center, and in the vicinity of the outer peripheral side have a shape that bulges upward at the highest height.

  The blade portions 110 and 120 are disposed on one surface of the stirring blade 100 and project in the axial direction.

  Further, a plurality of bump-like protrusions 111 are provided so as to be arranged at equal intervals in the radial direction on the front edge side of the blade portion 110 (when counterclockwise rotation is forward rotation). The size of the plurality of protrusions 111 of the blade 110 is approximately equal.

  In addition, a plurality of bump-like protrusions 121 are provided to be spaced apart in the radial direction on the front edge side of the blade portion 120 (when counterclockwise rotation is forward rotation), and the rear edge side of the blade portion 120 A plurality of hump-like protrusions 122 are provided so as to be arranged at equal intervals in the radial direction in the case where clockwise rotation is forward rotation. The plurality of protrusions 121 of the blade 120 have substantially the same size.

  A plurality of ribs 103 a are provided on the surfaces of the blade portions 110 and 120 of the stirring blade 100, and a plurality of ribs 103 b are provided on the surface of the recess 102 of the stirring blade 100.

  The ribs 103 a and 103 b are juxtaposed in the flow direction of the washing water on the surface of the agitating blade 100 and extend in the direction orthogonal to the direction. Further, on the surface of the agitating blade 100, the distance between the ribs 103a and 103b in the region where the average velocity of the washing water flow is large is narrower than the distance between the ribs 103a and 103b in the region where the average velocity of the water flow is slow There is.

  Specifically, on the upper surfaces of the blade portions 110 and 120, a plurality of ribs 103a extending in the radial direction of the stirring blade 100 are provided in parallel in the circumferential direction. At this time, the plurality of ribs 103a are formed such that the distance between the outer peripheral ribs 103a is smaller than the distance between the inner peripheral ribs 103a. Further, on the upper surface of the recess 102, a plurality of ribs 103b extending in the circumferential direction of the stirring blade 100 are provided in parallel in the radial direction. At this time, the rib 103b is curved with respect to an arc centered on the rotation center, the distance from the rotation center is small at a position near the blade portions 110 and 120, and the distance from the rotation center is large at a distant position. There is. In addition, the distance between the ribs 103b near the blade portions 110 and 120 is smaller than the distance between the ribs 103b.

  FIG. 3 shows a top view of the stirring blade 100. In FIG. 3, the same components as those of the agitating blade 100 shown in FIG. 2 are denoted by the same reference numerals.

  Further, FIG. 4 shows a longitudinal sectional view seen from the IV-IV line in FIG. 3, and FIG. 5 shows a longitudinal sectional view seen from the V-V line in FIG. In FIGS. 4 and 5, the same components as those of the agitating blade 100 shown in FIGS. 1 to 3 are given the same reference numerals.

  As shown in FIG. 4 and FIG. 5, the lower surface of the stirring blade 100 is provided with a boss portion 130 having an axial hole 106 at the center. The tip of the stirring blade shaft 45 (shown in FIG. 1) is inserted into the axial hole 106 of the boss portion 130. Further, groove portions 117 are formed on the back sides of the two blade portions 110 formed on the surface of the stirring blade 100. Thereby, the blade parts 110 and 110 and the groove part 117 are in a relationship of front and back integral. Further, the open end 117 a on the outer peripheral side of the groove portion 117 faces the peripheral wall 30 b (shown in FIG. 1) of the stirring tank 30.

  At the bottom of the groove portion 117, a thin plate-like blade portion 118 extending in the radial direction is provided in a protruding manner. The blade portion 118 horizontally extends at a constant height in the radial direction from the inner end near the center of the stirring blade 100, and the height of the outer peripheral side gradually decreases with respect to the inner peripheral side as it approaches the outer peripheral end. It is formed. Such shaped blade portion 118 is suitable for scraping water in the radial direction.

  Similarly, a groove 127 (shown in FIG. 5) is formed on the back side of the two blades 120 and 120, and a thin plate-like blade (not shown) extending in the radial direction is formed at the bottom of the groove 127. ) Is provided.

  Therefore, due to the rotation of the agitating blade 100, the blade portion 118 on the back side of the blade portions 110 and 110 and the blade portion on the back side of the blade portions 120 and 120 are wash water between the agitating blade 100 and the bottom wall 30a of the agitating tank 30. To create a strong water flow radially outward along the groove 127.

  Next, the water flow by rotation of the stirring blade 100 will be described according to FIG.

  In FIG. 6, when the agitating blade 100 rotates counterclockwise, the water flow f1 from the recess 102 collides with the plurality of protrusions 111 of the blade 110, and vertical vortices are formed downstream from each protrusion 111. (The same applies to the plurality of protrusions 121 of the blade 120). The vertical vortex generates a lift for the water flow f2 on the downstream side. The lift against the water flow suppresses the water flow f2 passing above the blade portion 110 so that it does not separate on the downstream side, thereby strengthening the water flow in the circumferential direction.

  As a result, the circumferential water flow is enhanced, and an outward water flow f3 is generated from the central portion of the stirring blade 100, so that the suction water flow f4 from above is enhanced in the central portion of the stirring blade 100.

  In this manner, the flow of water in the stirring tank 30 can be enhanced with a simple configuration, and the laundry on the flow of the washing water is more strongly stirred.

  FIG. 7 shows the water flow generated in the stirring tank 30 of the washing machine 1. As shown in FIG. 7, when the stirring blade 100 rotates, water flows in the circumferential direction due to the blade portions 110 and 120 on the upper surface of the stirring blade 100. In the recess 102, a water flow is generated radially outward along the wall surfaces of the blades 110 and 120 in the rotational direction.

  Moreover, in the lower surface of the stirring blade 100, the groove parts 117 and 127 (shown in FIG. 3, FIG. 4) form the water channel. Water flows radially from the inner peripheral side to the outer peripheral side of the groove portions 117 and 127 by the centrifugal force (water flow C). At this time, the thin plate-like blade portion 118 of the groove portion 117 and the thin plate-like blade portion of the groove portion 127 function like an oar so that water is scraped out and strong toward the peripheral wall 30 b of the stirring tank 30. A water stream is formed.

  Then, the water flowing out of the groove portions 117 and 127 of the stirring blade 100 passes through the gap between the stirring blade 100 and the peripheral wall 30 b and becomes a water flow Y rising along the peripheral wall 30 b. At this time, since the lower end of the peripheral wall 30b is formed into a curved surface, the water flow can be smoothly raised.

  By repeating the normal rotation and the reverse rotation of the stirring blade 100, waves in which the traveling direction is reversed collide with each other to form a stationary wave oscillating in the vertical direction in the stirring tank 30. The number of antinodes of the stationary wave is in proportion to the number of blade portions 118.

  Since the space on the back side of the agitating blade 100 is in a negative pressure state after the washing water is pushed out to the outside, new washing water is obtained from the plurality of small holes 104 (shown in FIG. 2) near the center of the agitating blade 100. In the vicinity of the rotation center above the stirring blade 100, a downward flowing water flow is generated. Thereby, the washing water is continuously circulated in the stirring tank 30 by the falling water flow and the rising water flow.

  The stationary wave U is a reciprocating water flow that oscillates in the vertical direction with respect to the water surface, and the vertical reciprocating motion acts on the laundry alternately. As a result, a vertical shearing force acts on the laundry, and a mechanical operation such as rubbing on the laundry is performed. Therefore, the standing wave U contributes to the improvement of the washing effect of the laundry.

  Further, a twisting action is exerted on the laundry by the rotational water flow X which is a circumferential water flow. In the stirring tank 30, the rotary water flow X and the water flow of the stationary wave U simultaneously work on the laundry. Thereby, in addition to the shear force in the vertical direction, twisting in the circumferential direction is added and the cleaning effect is improved. In addition, the laundry appropriately moves by the rising water flow Y rising on the outer peripheral side of the stirring tank 30 and the falling water flow Z flowing downward near the rotation center, and a uniform cleaning power works on the entire laundry.

  Here, since the water flow by the stirring blade 100 is strengthened by the plurality of protrusions 111 of the blade 110 and the plurality of protrusions 121 of the blade 120, the rising water flow Y is strengthened and the height of the standing wave U is Δh Along with the increase, the descending water flow Z is also strengthened.

  Therefore, according to the washing machine 1 of the said structure, the stirring effect of the laundry can increase and it can improve cleaning power. Thereby, the cleaning time can be shortened and power saving of the washing machine 1 can be achieved. In addition, along with the water flow action of the stirring blade 100 being significantly improved, the solubility of the detergent also improves, which contributes to the improvement of the cleaning effect.

  Thus, when the flow of the wash water which is a fluid is generated by the rotation of the agitating blade 100, a boundary layer of the washing water is generated on the surface of the agitating blade 100, and a high viscosity region exists in the boundary layer. Therefore, by providing the ribs 103a and 103b in parallel on the surface of the agitating blade 100, the boundary layer can be broken and the frictional resistance can be reduced.

  A part of the washing water swirls and stagnates between the ribs 103a and the ribs 103b on the surface of the stirring blade 100 to form a stagnation portion (vortex). The washing water flowing above the ribs 103a and 103b flows on the stagnant portion stagnating between the upper surfaces of the ribs 103a and 103b and the ribs 103a and 103b. At this time, the frictional resistance of the washing water can be reduced by the bearing effect of the stagnation portion in addition to the small contact area between the washing water and the upper surfaces of the ribs 103a and 103b.

  A large number of small holes 104 penetrating the stirring blade 100 are provided between the adjacent ribs 103a and between the ribs 103b. The small holes 104 are also provided in the blade portions 110 and 120. The small holes 104 generate a water flow that is sucked into the space on the back side of the agitating blade 100 that is under negative pressure when the agitating blade 100 rotates.

  According to the stirring blade 100 of the first embodiment, the plurality of protruding portions 111 are spaced apart in the radial direction on the front edge side of the blade portions 110 and 120 with which the washing water collides by the rotation of the stirring blade 100 itself. , 121, the vertical vortices are formed downstream from the respective projections 111, 121. The vertical vortex generates lift for the washing water. Due to the lift with respect to the washing water, the washing water flowing on the upper side of the wing portions 110 and 120 is suppressed so as not to be separated at the downstream side, and the circumferential water flow is strengthened. Thereby, by strengthening the flow of wash water with a simple configuration, it is possible to more strongly stir the laundry that is on the flow of the wash water. When the cleaning power is constant, power consumption for driving the agitating blade 100 can be reduced.

  The plurality of protrusions 111 and 121 are provided, for example, on the slightly upstream side of the flow from the axial maximum height position of the blade portions 110 and 120 serving as separation points, that is, at a position closer to one circumferential direction from the maximum height position. .

  The plurality of protrusions 111 and 121 are provided at locations where washing water strikes and contributes most to the stirring (the highest locations of raised blade portions 110 and 120 and the portions rising like walls etc.) The new vortices (rotational energy) are given to the washing water by forming longitudinal vortices from the convexes (protrusions) of the concavo-convex shape by striking the respective projections 111, 121 to the wash water to generate from the feathers 110, 120 Physically hold off the exfoliation, thereby enhancing the flow of washing water.

  Further, the plurality of protrusions 111 and 121 can prevent the flow from being separated from the axial maximum height position of the blade portions 110 and 120, and the water flow can be reinforced without waste along with the input power. In the washing machine 1 using the stirring blade 100, the cleaning power is enhanced without waste according to the power supplied.

  Further, a plurality of vertical vortices can be generated by the plurality of protruding portions 111 and 121, and the effect of dissolving and foaming the powder detergent or the laundry soap by the vortices can be exhibited.

  In the case of a stirring blade for agitating washing water by reverse rotation, when a plurality of protrusions are provided on both the front edge side and the rear edge side of the rotation direction of the blade, washing water is used in both rotation directions. You can strengthen the flow.

  Further, by inverting the stirring blade forward and reverse to agitate the washing water, waves having reverse traveling directions collide with each other to generate a standing wave of washing water which vibrates in the vertical direction. The stationary wave generates a vertical shear force in the wash water, and the suction flow generated from the projection further strengthens the vertical shear force. Further, by providing the radial blade portion, a stable water flow can be generated both in forward rotation and reverse rotation. In addition, when it is desired to change the water flow during forward rotation and reverse rotation, spiral blades may be provided instead of the radial flow.

  The washing machine 1 configured as described above throws the laundry into the stirring tank 30, and controls the water supply valve to supply water to a predetermined water level by the control unit 70 that has received the operation start command. Next, when the washing process is started, the power of the motor 41 is transmitted to the stirring blade 100 through the belt mechanism 42 and the stirring blade shaft 45 to alternately rotate the stirring blade 100 clockwise and counterclockwise. In accordance with the operation of the stirring blade 100 at this time, the laundry and the washing water in the stirring tank 30 are stirred, and the washing of the laundry proceeds.

  Further, as the heights of the plurality of projections 111 of the wing 110 and the plurality of projections 121 of the wing 120 become higher, the cloth of the laundry and the projections 111 and 121 collide with each other to increase the damage to the cloth. The height of the protrusions 111 and 121 with respect to the interval of the unevenness formed by the protrusions 111 and 121 is set to a height that does not damage the laundry by the protrusions 111 and 121.

  Further, by providing the rib 103a extending in the radial direction on the vanes 110 and 120 radially provided on the agitating blade 100, it is possible to reduce the frictional resistance of the washing water on the upper surface of the vanes 110 and 120. .

  In addition, by providing a plurality of small holes 104 between adjacent ribs 103a and ribs 103b of the stirring blade 100, it is possible to reduce the space on the back side of the stirring blade 100 under negative pressure when the stirring blade 100 rotates. Washing water is sucked through the holes 104.

  In the first embodiment, the plurality of protrusions 122 are provided on the trailing edge side of the blade unit 120 (when the counterclockwise rotation is forward rotation), the plurality of protrusions may not be provided on the trailing edge side of the blade unit.

  Moreover, according to the washing machine 1 of the said structure, when the stirring blade 100 arrange | positioned in the stirring tank 30 rotates, the water flow in the stirring tank 30 can be reinforced and it can stir effectively, and it is a flow in a wash water. The washing can be strongly stirred to improve the detergency.

  In addition, a screw (fluid flow generation unit) that rotates integrally with the stirring blade 100 may be provided in the central portion of the stirring blade 100. The screw generates a vertical water flow. Thereby, it is possible to generate a water flow blown out from the center side of the stirring blade, and it is possible to further strengthen the water flow reinforced by the plurality of projections provided on the blade.

  In addition, an opening may be provided at the center of the stirring blade 100. Since the air can be sucked from the lower side of the stirring blade through this opening, the water flow reinforced by the longitudinal vortices generated at the plurality of projections of the blade can strengthen the blowout flow of the central part. If a plurality of protrusions are provided on both sides of the blade, the suction flow at the central portion generated at the time of reverse may be further strengthened, which may make it difficult to blow off. If it is desired to strengthen only the blowout flow at the central portion, it is preferable to provide a plurality of projections that function only when blowing out.

  Furthermore, by attaching a cap-like protective cover so as to cover the screw housing portion that accommodates the above-mentioned screw, it is possible to prevent the laundry from being damaged by the screw. By providing a plurality of projections on the protective cover, the effect of washing the laundry can be obtained.

Second Embodiment
FIG. 8 shows a top view of a stirring blade 200 according to a second embodiment of the present invention. The stirring blade 200 is used in a washing machine having the same configuration as the washing machine 1 of the first embodiment.

  As shown in FIG. 8, the stirring blade 200 has a disk shape with a diameter of 400 mm, and is formed in a tray shape that becomes deeper toward the center with respect to the peripheral portion 200a. On the surface of the stirring blade 200, vanes 210 and vanes 220 radially arranged at a central angle of 90 ° are formed to protrude. The vanes 210 and the vanes 220 are alternately arranged in the circumferential direction, and are provided with four recessed portions 202 adjacent to the vanes 210 and 220 in the circumferential direction. The diameter of the stirring blade 200 may be appropriately set according to the configuration of the washing machine and the like.

  The two blade portions 210 are point-symmetrical with respect to the rotation center, and have a shape in which the vicinity of the middle between the inner periphery and the outer periphery in the radial direction bulges upward most. On the other hand, the two blade portions 220 are point-symmetrical with respect to the rotation center, and in the vicinity of the outer peripheral side have a shape that bulges upward at the highest height.

  The blade portions 210 and 220 are disposed on one surface of the stirring blade 200 and project in the axial direction.

  Further, a plurality of bump-like protrusions 211 are provided so as to be spaced apart in the radial direction on the front edge side of the blade portion 210 (when counterclockwise rotation is forward rotation). The plurality of protrusions 211 of the blade 210 gradually decrease in distance between the protrusions 211 adjacent to each other from the inner side in the radial direction toward the outer side in the radial direction, and from the inner side in the radial direction to the outer side in the radial direction Thus, the size of the protrusion 211 is gradually reduced.

  Further, a plurality of bump-like protrusions 221 are provided so as to be spaced apart in the radial direction on the front edge side of the blade portion 220 (when counterclockwise rotation is forward rotation). The intervals between the protrusions 221 adjacent to each other are gradually narrowed from the inner side in the radial direction toward the outer side in the radial direction, and the plurality of projections 221 of the blade portion 220 are from the inner side in the radial direction to the outer side in the radial direction. Thus, the size of the protrusion 221 is gradually reduced.

  A plurality of ribs 203 a are provided on the surfaces of the blade portions 210 and 220 of the stirring blade 200, and a plurality of ribs 203 b are provided on the surface of the recess 202 of the stirring blade 200.

  A large number of small holes 204 which penetrate the stirring blade 200 are provided between adjacent ribs 203a and between ribs 203b. The small holes 204 are also provided in the blade portions 210 and 220. The small holes 204 generate a water flow that is sucked into the space on the back side of the agitating blade 200 that is under negative pressure when the agitating blade 200 rotates.

  The stirring blade 200 and the stirring tank 30 constitute a stirring device.

  The stirring blade 200 of the second embodiment is different in that there is no plurality of projections 122 of the blade portion 120 of the stirring blade 100 of the first embodiment shown in FIG. 2, but the stirring blade 100 of the first embodiment Have the same effect as

  In addition, the plurality of protrusions 211 and 221 are configured such that the distance between the protrusions 211 and 221 adjacent to each other is gradually narrowed from the inner side in the radial direction toward the outer side in the radial direction. In 221, by making the sizes of the protrusions 211 and 221 gradually decrease from the inner side in the radial direction toward the outer side in the radial direction, the area where the average speed of the washing water is large (the outer side in the radial direction) and the small area It becomes possible to make the Reynolds number of the surface of the agitating blade 200 in (radially inside) constant. As a result, the action of the washing water on the stirring blade 200 becomes uniform, so that the water flow-up effect on the surface of the stirring blade 200 can be uniformly obtained.

  In the plurality of protrusions, the distance between the protrusions adjacent to each other may be gradually narrowed from the inner side in the radial direction to the outer side in the radial direction, and the sizes of the protrusions may be the same. Further, the plurality of protrusions may have the size of the protrusions gradually reduced from the inner side in the radial direction toward the outer side in the radial direction, and the intervals between the adjacent protrusions may be equal.

  Further, in a washing machine for agitating washing water by rotating the agitating blade 200 forwardly and reversely, when counterclockwise as viewed from above is taken as a forward rotation direction, only on the front edge side in the forward rotation direction of the blade portions 210, 220 A plurality of protrusions 211 and 221 are provided. This enhances the flow of wash water in the forward rotation direction, but does not strengthen the flow of wash water in the reverse rotation direction, so it is possible to create different water flows depending on the rotation direction, and a more complex water flow is formed. it can. Such a complicated water flow makes the detergent and the like more soluble, which can improve the detergency.

  In addition, a screw (fluid flow generation unit) that rotates integrally with the stirring blade 200 may be provided in a central portion of the stirring blade 200. The screw generates a vertical water flow. Thereby, it is possible to generate a water flow blown out from the center side of the stirring blade, and it is possible to further strengthen the water flow reinforced by the plurality of projections provided on the blade.

  In addition, an opening may be provided at the center of the stirring blade 200. Since the air can be sucked from the lower side of the stirring blade through this opening, the water flow reinforced by the longitudinal vortices generated at the plurality of projections of the blade can strengthen the blowout flow of the central part. If a plurality of protrusions are provided on both sides of the blade, the suction flow at the central portion generated at the time of reverse may be further strengthened, which may make it difficult to blow off. If it is desired to strengthen only the blowout flow at the central portion, it is preferable to provide a plurality of projections that function only when blowing out.

  Furthermore, by attaching a cap-like protective cover so as to cover the screw housing portion that accommodates the above-mentioned screw, it is possible to prevent the laundry from being damaged by the screw. By providing a plurality of projections on the protective cover, the effect of washing the laundry can be obtained.

Modification of Second Embodiment
FIG. 9 is a perspective view showing a modified example of the stirring blade 200 of the second embodiment.

  The modified example shown in FIG. 9 is different from the stirring blade 200 of the second embodiment shown in FIG. 8 in that a through hole 240 is provided in the central portion, and the same reference numerals are used for the same components as in FIG. Is attached.

  In FIG. 9, when the stirring blade 200 rotates counterclockwise, the water flow f11 from the concave portion 202 collides with the plurality of protrusions 211 of the blade portion 210, and vertical vortices are formed downstream from each protrusion 211 (The same applies to the plurality of protrusions 221 of the blade 220). Lifting force is generated with respect to the water flow f12 on the downstream side by the vertical vortex. The lift against the water flow is a force to suppress the water flow f12 on the upper side of the blade portion 110 so as not to be separated at the downstream side.

  As a result, the circumferential water flow is enhanced, and an outward water flow f13 is generated from the central portion of the stirring blade 200, so that the water flow f14 blown out from the through hole 240 in the central portion of the stirring blade 200 is strengthened.

  Thereby, the water flow in the stirring tank 30 can be strengthened with a simple configuration, and the laundry on the flow of the washing water can be more strongly stirred.

Third Embodiment
FIG. 10 shows a perspective view of a stirring blade 300 according to a third embodiment of the present invention. The stirring blade 300 is used in a washing machine having the same configuration as the washing machine 1 of the first embodiment.

  As shown in FIG. 10, the agitating blade 300 according to the third embodiment has a disk shape with a diameter of 400 mm, and the surface of the agitating blade 300 is formed in a tray shape that becomes deeper toward the center with respect to the peripheral portion 300a. It is done. On the surface of the agitating blade 300, two blade portions 301, 301 arranged radially at a central angle of 180 ° are formed to protrude. The two vanes 301, 301 are raised. The diameter of the stirring blade 300 may be appropriately set according to the configuration of the washing machine and the like.

  The two blade portions 301 and 301 are formed in the same shape, and the stirring blade 300 is formed in rotational symmetry of two-fold symmetry. The stirring blade 300 may be formed to be three-fold symmetric or four-fold symmetric. The wing portion 301 connects the upper end of the first side wall 301 a and the upper end of the second side wall 301 b facing each other in the rotational direction by an upper wall 301 c having a substantially planar shape. Both side edges of the upper wall 301c are curved so that the outer periphery is inclined toward the first side wall 301a with respect to the center line of the stirring blade 300 as viewed from above.

  Further, a bottom surface portion 302 having a curved center with a lowered center is provided between the adjacent blade portions 301, and the lower end of the first side wall 301a and the lower end of the second side wall 301b are connected by the bottom surface portion 302. At the time of washing, the agitating blade 300 is rotated, and the wing portion 301 generates a water flow of washing water in the agitating tank 30 (shown in FIG. 1). The bottom portion 302 is an example of a recess.

  The bottom portion 302 is provided with a large number of small holes 304 penetrating the stirring blade 300. The small holes 304 are also provided in the blade portion 301. The small holes 304 generate a water flow that is sucked into the space on the back side of the agitating blade 300 that is under negative pressure when the agitating blade 300 rotates.

  A plurality of bump-like protrusions 311 are provided so as to be aligned with ridge lines RL <b> 1 extending in the radial direction of the two blade portions 301.

  The plurality of protrusions 311 of the blade portion 301 gradually narrows the interval between the protrusions 311 adjacent to each other from the inner side in the radial direction to the outer side in the radial direction, and protrudes from the inner side in the radial direction to the outer side in the radial direction The size of the portion 311 is gradually reduced. This makes it possible to make the Reynolds number of the surface of the agitating blade 300 constant in the region where the average speed of the washing water is large (radial outer side) and the small region (radial inner side). For this reason, since the action of the washing water on the stirring blade 300 becomes uniform, the water flow-up effect on the surface of the stirring blade 300 can be obtained uniformly.

  Vertical vortices are formed downstream from each protrusion 311 by providing the plurality of protrusions 311 so as to be aligned with ridge lines RL <b> 1 extending in the radial direction of the blade portion 301 (protrusions). Lifting force is generated. The lift with respect to the washing water is a force for suppressing the washing water flowing on the upper side of the wing portion 301 not to be separated at the downstream side. Thereby, by strengthening the flow of wash water with a simple configuration, it is possible to more strongly stir the laundry that is on the flow of the wash water.

  In the stirring blade 300, the height gradually decreases while rotating from one of the two blade portions 301 (protruding portion) to the rotation center to reach the bottom portion 302 (concave portion), and further while gradually rotating. And the other wing 301 is connected to the other.

  In addition, ridgeline RL1 of the blade | wing part 301 in which the said several projection part 311 is formed is represented by the curve which connected the largest height position in the circumferential direction.

  According to the agitating blade 300 of the above configuration, when the agitating blade 300 rotates, the water flow from the bottom surface portion 302 collides with the plurality of protrusions 311 of the blade portion 301, and vertical vortices form downstream from each protrusion 311 Be done. The vertical vortices generate lift on the downstream water flow. The lift suppresses the flow of water passing through the upper side of the blade portion 110 so that it does not separate on the downstream side, thereby strengthening the flow of water in the circumferential direction.

  Thereby, the water flow in the stirring tank 30 can be strengthened with a simple configuration, and the laundry on the flow of the washing water can be more strongly stirred.

  The stirring blade 300 and the stirring tank 30 constitute a stirring device.

  In addition, a screw (fluid flow generation unit) that rotates integrally with the stirring blade 300 may be provided at a central portion of the stirring blade 300. The screw generates a vertical water flow. Thereby, it is possible to generate a water flow blown out from the center side of the stirring blade, and it is possible to further strengthen the water flow reinforced by the plurality of projections provided on the blade.

  In addition, an opening may be provided at the center of the stirring blade 300. Since the air can be sucked from the lower side of the stirring blade through this opening, the water flow reinforced by the longitudinal vortices generated at the plurality of projections of the blade can strengthen the blowout flow of the central part. If a plurality of protrusions are provided on both sides of the blade, the suction flow at the central portion generated at the time of reverse may be further strengthened, which may make it difficult to blow off. If it is desired to strengthen only the blowout flow at the central portion, it is preferable to provide a plurality of projections that function only when blowing out.

  Furthermore, by attaching a cap-like protective cover so as to cover the screw housing portion that accommodates the above-mentioned screw, it is possible to prevent the laundry from being damaged by the screw. By providing a plurality of projections on the protective cover, the effect of washing the laundry can be obtained.

Fourth Embodiment
FIG. 11 shows a perspective view of a stirring blade 400 according to a fourth embodiment of the present invention. The stirring blade 400 is used for a washing machine having the same configuration as the washing machine 1 of the first embodiment, and FIG. 1 is used.

  In the stirring blade 400 of the fourth embodiment, as shown in FIG. 11, the stirring blade 400 has a disk shape with a diameter of 400 mm, and is radially disposed on the surface of the stirring blade 400 at a central angle of 180 ° 2 Two blade portions 401 and 401 are formed to protrude. The two wings 401 and 401 are raised. The diameter of the stirring blade 400 may be appropriately set according to the configuration of the washing machine and the like.

  The two blade portions 401 and 401 are formed in the same shape, and the stirring blade 400 is formed in rotational symmetry of two-fold symmetry. The stirring blade 400 may be formed in three-fold symmetry or four-fold symmetry.

  Further, a bottom surface portion 402 is provided between the adjacent blade portions 401. The bottom portion 402 is an example of a recess.

  A plurality of bump-like protrusions 411 are provided at intervals in one circumferential direction with respect to the ridge line RL2 extending in the radial direction of the two blade parts 401, 401 and along the ridge line RL2.

  The plurality of protrusions 411 of the blade portion 401 gradually narrows the interval between the protrusions 411 adjacent to each other from the inner side in the radial direction to the outer side in the radial direction, and protrudes from the inner side in the radial direction to the outer side in the radial direction The size of the part 411 is gradually reduced. This makes it possible to make the Reynolds number of the surface of the agitating blade 400 in a region where the average speed of the washing water is large (radial outer side) and a small region (radial inner side) be constant. For this reason, since the action of the washing water on the stirring blade 400 is uniform, the water flow-up effect on the surface of the stirring blade 400 can be uniformly obtained.

  In the stirring blade 400, the height gradually decreases while rotating from one of the two blade portions 401 (protruding portion) to the rotation center, and reaches the bottom portion 402 (concave portion), and further gradually while rotating. The height is increased and is connected to the other blade portion 401.

  In addition, ridgeline RL2 of the blade | wing part 401 in which the said several projection part 411 is formed is represented by the curve which connected the largest height position in the circumferential direction.

  The stirring blade 400 and the stirring tank 30 constitute a stirring device.

  According to the agitating blade 400 having the above-described configuration, by providing the plurality of protrusions 411 at the location where the water flows collide, vertical vortices are formed from each protrusion 411 toward the downstream. The vertical vortices generate lift on the downstream water flow. The lift suppresses the flow of water passing through the upper side of the blade portion 110 so that it does not separate on the downstream side, thereby strengthening the flow of water in the circumferential direction.

  Thereby, the water flow in the stirring tank 30 can be strengthened with a simple configuration, and the laundry on the flow of the washing water can be more strongly stirred.

  Furthermore, in the washing machine for stirring the washing water by rotating the agitating blade 400 forward and reverse, when the counterclockwise direction viewed from above is the forward rotation direction, only on the front edge side in the forward rotation direction of the blade portions 401 and 401 A plurality of protrusions 411 are provided. This enhances the flow of wash water in the forward rotation direction, but does not strengthen the flow of wash water in the reverse rotation direction, so it is possible to create different water flows depending on the rotation direction, and a more complex water flow is formed. it can. Such a complicated water flow makes the detergent and the like more soluble, which can improve the detergency.

  In addition, by providing a plurality of protrusions 411 at intervals along one of the circumferential directions with respect to the ridge line RL2 extending in the radial direction of the blade portion 401 (the protruding portion), rotation is reversed in the forward and reverse directions. Can create a complex water flow.

  In addition, a screw (fluid flow generation unit) that rotates integrally with the stirring blade 400 may be provided at a central portion of the stirring blade 400. The screw generates a vertical water flow. Thereby, it is possible to generate a water flow blown out from the center side of the stirring blade, and it is possible to further strengthen the water flow reinforced by the plurality of projections provided on the blade.

  In addition, an opening may be provided at the center of the stirring blade 400. Since the air can be sucked from the lower side of the stirring blade through this opening, the water flow reinforced by the longitudinal vortices generated at the plurality of projections of the blade can strengthen the blowout flow of the central part. If a plurality of protrusions are provided on both sides of the blade, the suction flow at the central portion generated at the time of reverse may be further strengthened, which may make it difficult to blow off. If it is desired to strengthen only the blowout flow at the central portion, it is preferable to provide a plurality of projections that function only when blowing out.

  Furthermore, by attaching a cap-like protective cover so as to cover the screw housing portion that accommodates the above-mentioned screw, it is possible to prevent the laundry from being damaged by the screw. By providing a plurality of projections on the protective cover, the effect of washing the laundry can be obtained.

Fifth Embodiment
FIG. 12 shows an exploded perspective view of the stirring blade 500 according to the fifth embodiment of the present invention. The stirring blade 500 is used for a washing machine having the same configuration as the washing machine 1 of the first embodiment, and FIG. 1 is used.

  As shown in FIG. 12, the stirring blade 500 has a disk shape with a diameter of 400 mm, and is formed in a tray shape that becomes deeper toward the center with respect to the peripheral portion 500a. On the surface of the agitating blade 500, a blade portion 510 and a blade portion 520 radially arranged at a central angle of 90 ° are formed to protrude. The vanes 510 and the vanes 520 are alternately arranged in the circumferential direction. Further, four concave portions 502 circumferentially adjacent to the blade portions 510 and 520 are provided. The diameter of the stirring blade 500 may be appropriately set according to the configuration of the washing machine and the like.

  The two blade portions 510 are point-symmetrical with respect to the rotation center, and have a shape in which the vicinity of the middle between the inner periphery and the outer periphery in the radial direction bulges upward most. On the other hand, the two blade portions 520 are point-symmetrical with respect to the rotation center, and in the vicinity of the outer peripheral side are in the shape of bulging upward at the highest.

  The blade portions 510 and 520 are disposed on one surface of the stirring blade 500 and project in the axial direction.

  In addition, a plurality of bump-like protrusions 511 are provided at equal intervals in the radial direction on the front edge side of the blade 510 (when counterclockwise rotation is forward rotation). The plurality of projections 511 of the blade 510 gradually decrease in distance between the adjacent projections 511 from the inside in the radial direction toward the outside in the radial direction, and from the inside in the radial direction to the outside in the radial direction Thus, the size of the projection 511 is gradually reduced.

  Further, a plurality of bump-like protrusions 521 are provided so as to be spaced apart in the radial direction on the front edge side of the blade 520 (when counterclockwise rotation is forward rotation). The intervals between the protrusions 521 adjacent to each other are gradually narrowed from the inner side in the radial direction toward the outer side in the radial direction, and the plurality of protrusions 521 of the blade portion 520 are from the inner side in the radial direction to the outer side in the radial direction. The size of the protrusion 521 is gradually reduced.

  This makes it possible to make the Reynolds number of the surface of the agitating blade 500 in a region where the average speed of the washing water is large (radial outer side) and a small region (radial inner side) be constant. As a result, the action of the washing water on the stirring blade 500 becomes uniform, so that the water flow-up effect on the surface of the stirring blade 500 can be uniformly obtained.

  A plurality of ribs 503 a are provided on the surfaces of the blade portions 510 and 520 of the stirring blade 500, and a plurality of ribs 503 b are provided on the surface of the recess 502 of the stirring blade 500.

  A large number of small holes 504 which penetrate the stirring blade 500 are provided between the adjacent ribs 503a and between the ribs 503b. The small holes 504 are also provided in the blade portions 510 and 520. The small holes 504 generate a water flow that is sucked into the space on the back side of the agitating blade 500 that is under negative pressure when the agitating blade 500 rotates.

  In addition, a screw storage portion 540 having a diameter of 100 mm is provided at the central portion of the stirring blade 500. The shaft portion 550 is erected at the center of the screw storage portion 540.

  In addition, the stirring blade 500 has a screw 600 attached to the shaft 550 and a cap-like protective cover 700 attached so as to cover the screw storage portion 540 accommodating the screw 600. The screw 600 is an example of a fluid flow generation unit that generates a fluid flow in the vertical direction. The protective cover 700 is made of a transparent resin so that the inner screw 600 can be seen visually.

  FIG. 13 is a perspective view of the screw 600 of the stirring blade 500 as viewed obliquely from above, and FIG. 14 is a perspective view of the screw 600 of the stirring blade 500 as viewed obliquely from below.

  As shown in FIGS. 13 and 14, the screw 600 has a cylindrical portion 601 having an axial hole 601 a and four blades 602 provided on the side surface of the cylindrical portion 601 at equal intervals in the circumferential direction.

  The screw 600 has a wave-shaped front edge portion 602 a when it rotates counterclockwise as viewed from above. In the wave-shaped front edge portion 602a, the pitch of adjacent waves is gradually narrowed from the inner side to the outer side in the radial direction, and the size of the wave is increased from the inner side in the radial direction to the outer side in the radial direction Is gradually getting smaller.

  The shaft portion 550 (shown in FIG. 12) is inserted into the shaft hole 601 a of the cylindrical portion 601 of the screw 600. At this time, the keys 550a, 550a of the shaft portion 550 (shown in FIG. 12) are fitted into the key grooves 601b, 601b provided in the cylindrical portion 601 of the screw 600.

  FIG. 15 is a perspective view of the protective cover 700 of the stirring blade 500 as viewed obliquely from above. As shown in FIG. 15, this protective cover 700 has a dome portion 701, a cylindrical portion 702 extending downward from the lower side edge of the dome portion 701, and four legs 703 extending downward from the lower end of the cylindrical portion 702. . An engaging claw 703 a is provided at the lower end of the leg portion 703.

  A plurality of bump-like first protrusions 710 and a plurality of bump-like second protrusions 720 smaller than the first protrusions 710 are provided on the surface of the dome portion 701. Further, a plurality of small holes 704 are provided in the area of the dome portion 701 excluding the first and second protrusions 710 and 720.

  The stirring blade 500 shown in FIG. 16 shows a top view of a state in which the screw 600 and the protective cover 700 are attached. In FIG. 16, the same components as in FIG. 12 are assigned the same reference numerals.

  FIG. 17 shows a longitudinal cross-sectional view as seen from line XVII-XVII in FIG. In FIG. 17, the same components as in FIG. 12 are assigned the same reference numerals.

  FIG. 18 shows a perspective view of the stirring blade 500 with the screw 600 and the protective cover 700 attached. In FIG. 18, the same components as in FIG. 12 are assigned the same reference numerals.

  FIG. 19 shows a top view of the agitating blade 500 with the protective cover 700 removed. In FIG. 19, the same components as in FIG. 12 are assigned the same reference numerals.

  Furthermore, FIG. 20 shows a side view of the stirring blade 500 shown in FIG. 19 as viewed from the right side. In FIG. 22, the same components as in FIGS. 12 to 19 are denoted by the same reference numerals.

  As shown in FIG. 20, a thin plate-like blade portion 518 extending in the radial direction is erected in the groove portion 517 on the back side of the blade portion 510.

  FIG. 21 shows a back side view of the stirring blade 500. As shown in FIG. 21, a boss 530 having an axial hole 506 is erected at the center of the lower surface of the stirring blade 500. The tip of the agitating blade shaft 45 is fixed to the axial hole 506 of the boss 530. Further, a thin plate-like blade portion 518 extending in the radial direction is erected in a groove portion 517 on the back side of the blade portion 510 (shown in FIG. 19). Further, a thin plate-like blade portion 528 extending in the radial direction is erected in a groove portion 527 on the back side of the blade portion 520 (shown in FIG. 19).

  The wing portion 510 and the groove portion 517 are in an integral relationship with each other. Further, the blade portion 520 and the groove portion 527 are in an integral relationship with each other. The open ends 517a and 527a on the outer peripheral side of the grooves 517 and 527 face the peripheral wall 30b (shown in FIG. 1) of the stirring tank 30.

  The blade portions 518, 528 horizontally extend at a constant height in the radial direction from the inner end near the center of the stirring blade 500, and the height of the outer peripheral side gradually with respect to the inner peripheral side toward the outer end. It is formed to be low. Such shaped blade portions 518, 528 are suitable for scraping water radially. Therefore, by the rotation of the agitating blade 500, the blade portions 518 and 528 scrape the washing water between the agitating blade 500 and the peripheral wall 30b of the agitating tank 30, and a strong water flow radially outward along the groove portions 517 and 527. generate.

  The stirring blade 500 and the stirring tank 30 constitute a stirring device.

  FIG. 22 is a top view of the stirring blade 500 with the protective cover 700 and the screw 600 removed. In FIG. 22, the same components as in FIGS. 12 to 19 are denoted by the same reference numerals.

  As shown in FIG. 22, a plurality of openings 540 a are provided in the screw storage portion 540 in the central portion of the stirring blade 500. The opening 540 a has a plurality of fan-shaped openings. The opening 540 a forms a flow path in which washing water flows in the vertical direction between the back surface side and the top surface side of the central portion of the stirring blade 500.

  Next, the water flow of the stirring blade 500 will be described according to FIGS.

  FIG. 23 shows a water flow when the stirring blade 500 is rotated clockwise as viewed from above, and FIG. 24 shows a water flow when the stirring blade 500 is rotated counterclockwise as viewed from above. The same reference numerals as in FIGS. 12 to 19 denote the same parts as in FIGS. Further, in FIGS. 23 and 24, the protective cover 700 is omitted to make the drawings easy to see.

  According to the stirring blade 500 configured as described above, as shown in FIG. 23, the central screw 600 of the stirring blade 500 is also integrally rotated with the stirring blade 500 by rotating the stirring blade 500 clockwise as viewed from above .

  At this time, after the washing water is pushed outward, the space on the back side of the stirring blade 500 is in a negative pressure state, so new washing water flows in from the plurality of small holes 504 in the vicinity of the center of the stirring blade 500. In the vicinity of the rotation center above the stirring blade 500, a downward flowing water flow is generated. As a result, the washing water continues to circulate in the stirring tank 30 by the water flow falling on the center side and the water flow rising on the outer peripheral side.

  Due to the clockwise rotation (reverse rotation) of the screw 600, the washing water is sucked in at the central portion of the agitating blade 500 and flows into the lower side of the agitating blade 500 through the opening 540a (shown in FIG. 22) Water flows radially from the inner circumferential side to the outer circumferential side of the groove portions 517 and 527 (shown in FIG. 21) by centrifugal force. At this time, the thin plate blade portion 518 of the groove portion 517 and the thin plate blade portion 528 of the groove portion 527 function like an oar so that water is scraped out and the peripheral wall 30b of the stirring tank 30 (FIG. Strong water flow is formed toward the

  And the water which flowed out of slot 517, 527 of stirring blade 500 passes along the crevice between stirring blade 500 and peripheral wall 30b, and rises along peripheral wall 30b.

  On the other hand, as shown in FIG. 24, by rotating the stirring blade 500 counterclockwise as viewed from above, the central screw 600 of the stirring blade 500 rotates integrally with the stirring blade 500.

  Due to the counterclockwise rotation (forward rotation) of the screw 600, the washing water is blown out from the lower side of the central portion of the stirring blade 500 through the opening 540a (shown in FIG. 22). At this time, water flows radially from the inner circumferential side to the outer circumferential side of the groove portions 517 and 527 by centrifugal force. At this time, the thin plate blade portion 518 of the groove portion 517 and the thin plate blade portion 528 of the groove portion 527 function like an oar, so that the water is scraped out and the water is directed toward the peripheral wall 30 b of the stirring tank 30. A strong stream of water is formed.

  And the water which flowed out from slot 517, 527 of stirring blade 500 passes along the crevice between stirring blade 500 and surrounding wall 30b, and rises to the upper part of stirring tank 30 along surrounding wall 30b.

  At this time, a wave that vibrates up and down is generated on the water surface of the agitating tank 30 in any of the normal rotation and the reverse rotation of the stirring blade 500, and a raised portion corresponding to the number of grooves is formed.

  According to the stirring blade 500, by rotation of the screw 600, it is possible to generate up-and-down reciprocating water flow (suction flow, blow-out flow) in the central portion of the stirring tank 30. In particular, the generation of the blowoff flow which can not be generated by the conventional stirring blades greatly increases the stirring power.

  Further, as shown in FIG. 24, by providing the opening 540 a in the stirring blade 500, the water flow reinforced by the plurality of protrusions 511 of the blade 510 and the plurality of protrusions 521 of the blade 120 can be used. Can further strengthen the flow from the air.

  According to the stirring blade 500 of the fifth embodiment, the plurality of protrusions 511 are arranged in the radial direction at intervals on the front edge side of the blade portions 510 and 520 with which the washing water collides by the rotation of the stirring blade 500 itself. , 521, vertical vortices are formed downstream from the protrusions 511, 521. The vertical vortex generates lift for the washing water. The lift for the washing water suppresses the washing water flowing above the wing portions 510 and 520 not to be peeled off at the downstream side. Thereby, by strengthening the flow of wash water with a simple configuration, it is possible to more strongly stir the laundry that is on the flow of the wash water.

  Further, in a washing machine for agitating washing water by rotating the agitating blade 500 forwardly and reversely, when counterclockwise as viewed from above is taken as a forward rotation direction, only on the front edge side in the forward rotation direction of the blade portions 510, 520 A plurality of protrusions 511 and 521 are provided. This enhances the flow of wash water in the forward rotation direction, but does not strengthen the flow of wash water in the reverse rotation direction, so it is possible to create different water flows depending on the rotation direction, and a more complex water flow is formed. it can. In particular, in a washing machine using a stirring blade, detergent and the like are easily dissolved by such a complicated water flow, and the detergency can be improved.

  In addition, the screw 600 (fluid flow generation unit) provided at the central portion of the stirring blade 500 rotates integrally with the stirring blade 500 to generate a vertical water flow. Thereby, it is possible to generate a water flow blown out from the center side of the stirring blade 500, and it is possible to further strengthen the water flow reinforced by the plurality of protrusions 511, 521 provided on the blade portions 510, 520.

  Furthermore, since there is an opening 540 a at the center of the agitating blade 500 and suction can be made from the lower side of the agitating blade 500, the water flow reinforced by the longitudinal vortices generated in the plurality of protrusions 511 and 521 of the blade 510, 520, The central flow can be enhanced. If a plurality of projections are provided on both sides of the vanes 510 and 520, the suction flow at the central portion generated at the time of inversion may be further strengthened, which may make it difficult to blow off. If it is desired to strengthen only the blowout flow at the central portion, it is preferable to provide a plurality of projections that function only when blowing out.

  Furthermore, by providing the plurality of protrusions 710 and 720 on the cap-like protective cover 700, the washing effect can be obtained.

  With conventional stirring blades, for example, powder detergents and laundry soaps are difficult to dissolve, and if powder detergents and laundry soaps remain undissolved, the concentration of the detergent contained in the cleaning solution becomes low and the cleaning power becomes weak. It accumulates on the wall and bottom of the washing machine, and there is a problem that bacteria such as black mold proliferate there and contaminate the stirring wing and washing machine.

  On the other hand, according to the stirring blade 500 of the fifth embodiment, as shown in FIG. 13, the blade 602 of the screw 600 (fluid flow generation portion) is counterclockwise (left rotation) as viewed from above Vertical vortices are generated from the tips of the plurality of wave shapes of the front edge portion 602a, and the vertical vortices generated by the blades 602 collide with each other to efficiently stir and dissolve the detergent powder, thereby enhancing the cleaning effect. .

Sixth Embodiment
FIG. 25 shows a top view of a stirrer 800 according to a sixth embodiment of the present invention. The stirring blade 800 of the sixth embodiment has the same configuration as the stirring blade 500 of the fifth embodiment except for the screw 900, and is used for a washing machine having the same configuration as the washing machine 1 of the first embodiment. Figure 1 is incorporated.

  As shown in FIG. 25, the stirring blade 800 has a disk shape with a diameter of 400 mm, and is formed in a tray shape that becomes deeper toward the center with respect to the peripheral portion 800a. On the surface of the agitating blade 800, a blade portion 810 and a blade portion 820, which are alternately arranged in the circumferential direction radially at a central angle of 90 °, are formed to protrude. In addition, four concave portions 802 circumferentially adjacent to the blade portions 810 and 820 are provided. The diameter of the stirring blade 800 may be appropriately set according to the configuration of the washing machine and the like.

  The two blade portions 810 are point-symmetrical with respect to the rotation center, and have a shape in which the vicinity of the middle between the inner periphery and the outer periphery in the radial direction bulges upward most. On the other hand, the two blade portions 820 are point-symmetrical with respect to the rotation center, and in the vicinity of the outer peripheral side have a shape that bulges upward at the highest height.

  The blade portions 810 and 820 are disposed on one surface of the stirring blade 800 and project in the axial direction.

  Further, a plurality of bump-like protrusions 811 are provided so as to be arranged at equal intervals in the radial direction on the front edge side of the blade 810 (when counterclockwise rotation is forward rotation). The plurality of projections 811 of the blade 810 gradually decrease in distance between the adjacent projections 811 from the inside in the radial direction toward the outside in the radial direction, and from the inside in the radial direction to the outside in the radial direction Thus, the size of the protrusion 811 gradually decreases.

  Further, a plurality of bump-like protrusions 821 are provided so as to be spaced apart in the radial direction on the front edge side of the blade portion 820 (when counterclockwise rotation is forward rotation). In the plurality of protrusions 821 of the blade 820, the distance between the protrusions 821 adjacent to each other is gradually narrowed from the inner side in the radial direction toward the outer side in the radial direction, and from the inner side in the radial direction Thus, the size of the projection 821 gradually decreases.

  A plurality of ribs 803 a are provided on the surfaces of the blade portions 810 and 820 of the stirring blade 800, and a plurality of ribs 803 b are provided on the surface of the concave portion 802 of the stirring blade 800.

  A large number of small holes 804 are provided to penetrate the stirring blade 800 between adjacent ribs 803 a and between ribs 803 b. The small holes 804 are also provided in the blade portions 810 and 820. The small holes 804 generate a water flow that is sucked into the space on the back side of the agitating blade 800 that is under negative pressure when the agitating blade 800 rotates.

  In addition, a screw storage portion 840 is provided at a central portion of the stirring blade 800. A shaft portion 850 is erected at the center of the screw storage portion 840.

  The stirring blade 800 has a screw 900 attached to the shaft portion 850 and a cap-like protective cover 1000 (shown in FIG. 27) attached so as to cover the screw storage portion 840 accommodating the screw 900. The screw 900 is an example of a fluid flow generation unit.

  The stirring blade 800 of the sixth embodiment has the same configuration as the stirring blade 500 of the fifth embodiment except for the screw 900.

  FIG. 26 is a perspective view of the screw 900 of the stirring blade 800 as viewed obliquely from above. As shown in FIG. 26, the screw 900 has a cylindrical portion 901 having an axial hole 901a, and eight blades 902 provided on the side surface of the cylindrical portion 901 at equal intervals in the circumferential direction.

  As for the said screw 900, the front edge part 902a when it sees from upper direction and rotates anticlockwise is wave shape. In the wave-shaped front edge portion 902a, the pitches of adjacent waves are gradually narrowed from the inner side to the outer side in the radial direction, and the sizes of the waves from the inner side in the radial direction to the outer side in the radial direction Is gradually getting smaller.

  Further, the rear edge portion 902b of the screw 900 has a wave shape when it rotates counterclockwise as viewed from above. In the wave-like rear edge portion 902b, the pitches of adjacent waves are gradually narrowed from the inner side to the outer side in the radial direction, and the sizes of the waves from the inner side in the radial direction to the outer side in the radial direction Is gradually getting smaller.

  The shaft portion 850 (shown in FIG. 25) is inserted into the shaft hole 901 a of the cylindrical portion 901 of the screw 900. At this time, the key (not shown) of the shaft portion 850 is fitted in the two key grooves 901 b provided in the cylindrical portion 901 of the screw 900.

  FIG. 27 shows a side view of the main part including the screw 900. In FIG. 27, reference numeral 1000 denotes a protective cover. As shown in FIG. 27, when it rotates counterclockwise as viewed from above, a water flow is generated from the lower side to the upper side.

  FIG. 28 is a schematic view showing a longitudinal vortex generated by the blade 902 of the screw 900. As shown in FIG. In (a) of FIG. 28, longitudinal vortices are generated from the tips of the plurality of wave shapes of the front edge portion 902 a of the blade 902 in a counterclockwise direction (left rotation) as viewed from above. Then, the vertical vortices generated by the blades 902 collide with each other to efficiently stir and dissolve the detergent powder, thereby enhancing the cleaning effect.

  On the other hand, in (b) of FIG. 28, when viewed from above (clockwise), the trailing edge 902 b of the blade 902 is on the leading edge side, and longitudinal vortices are generated from the tips of the plurality of waves. Then, the vertical vortices generated by the blades 902 collide with each other to efficiently stir and dissolve the detergent powder, thereby enhancing the cleaning effect.

  In addition, since the separation from the blade 902 is suppressed by the longitudinal vortices generated by the blade 902 of the screw 900, the inclination of the blade 902 can be increased, and the water flow in the vertical direction can be further strengthened.

Seventh Embodiment
FIG. 29 shows a top view of a stirring blade 1100 according to a seventh embodiment of the present invention. The stirring blade 1100 is used in a washing machine having the same configuration as the washing machine 1 of the first embodiment, and FIG. 1 is used.

  In the stirring blade 1100 according to the seventh embodiment, as shown in FIG. 29, the stirring blade 1100 has a disk shape with a diameter of 400 mm, and the surface of the stirring blade 1100 is deeper toward the center with respect to the peripheral portion 1100a. It is shaped like a tray. On the surface of the stirring blade 1100, two blade portions 1101 radially disposed at a central angle of 180 ° are formed to protrude. The two wings 1101 are raised. The diameter of the stirring blade 1100 may be appropriately set according to the configuration of the washing machine and the like.

  The two blade portions 1101 and 1101 are formed in the same shape, and the stirring blade 1100 is formed in rotational symmetry of two-fold symmetry. The stirring blade 1100 may be formed in three-fold symmetry or four-fold symmetry. The wing portion 1101 connects the upper end of the first side wall 1101 a and the upper end of the second side wall 1101 b facing each other in the rotational direction by an upper wall 1101 c having a substantially planar shape. Both side edges of the upper wall 1101c are curved so that the outer periphery is inclined toward the first side wall 1101a with respect to the center line of the stirring blade 1100 as viewed from above.

  Further, a bottom surface portion 1102 of a curved surface whose center is lowered is provided between the adjacent blade portions 1101, and the lower end of the first side wall 1101 a and the lower end of the second side wall 1101 b are connected by the bottom surface portion 1102. At the time of washing, the agitating blade 1100 is rotated, and the wing portion 1101 generates a water flow of washing water in the agitating tank 30 (shown in FIG. 1). The bottom portion 1102 is an example of a recess.

  The stirring blade 1100 and the stirring tank 30 constitute a stirring device.

  In the stirring blade 1100, the height gradually decreases while rotating from one of the two blade portions 1101 (raised portion) to the rotation center, and reaches the bottom portion 1102 (concave portion), and further while gradually turning. The height is increased to be connected to the other blade 1101.

  In addition, a screw storage portion 1140 having a diameter of 160 mm is provided at a central portion of the stirring blade 1100. The shaft portion 1150 is erected at the center of the screw storage portion 1140. Further, the screw storage portion 1140 is provided with a plurality of openings 1140a. The opening 1140a has a plurality of fan-shaped openings. The opening 1140a forms a flow path in which washing water flows vertically between the back surface side and the top surface side of the central portion of the stirring blade 1100.

  The stirring blade 1100 has a screw 1200 attached to the shaft portion 1150 and a cap-like protective cover (not shown) attached so as to cover the screw storage portion 1140 that accommodates the screw 1200. The screw 1200 is an example of a fluid flow generation unit.

  The screw 1200 has the same configuration as the screw 600 of the fifth embodiment. Also, the protective cover has the same configuration as the protective cover 700 of the fifth embodiment.

  The screw 1200 (fluid flow generation unit) provided at the central portion of the stirring blade 1100 rotates integrally with the stirring blade 1100 to generate vertical water flow. This makes it possible to generate a water stream blown out from the center side of the stirring blade 1100, and the water stream can be strengthened.

  Furthermore, since there is an opening 1140a at the center of the stirring blade 1100 and suction can be made from the lower side of the stirring blade 1100, the blowout flow of the central portion can be strengthened.

  Furthermore, by providing a plurality of projections on the cap-like protective cover, the effect of washing the laundry can be obtained.

  In the stirring blade 1100 of the seventh embodiment, as in the stirring blade 300 of the third embodiment, a plurality of protrusions may be provided so as to align on the ridge line extending in the radial direction of the two blades 1101. .

  Although the washing machine provided with the stirring blade was demonstrated in the said 1st-7th embodiment, a stirring blade is applicable not only to this but the stirring apparatus for stirring various fluid.

  In the first to sixth embodiments, the blade portions 110, 120, 210, 220, 220, 301, 401, 510, 520, 810, and 820 have a plurality of bump-like protrusions 111, 121, 122, 211, and 221. , 311, 411, 511, 521, 811, 821 are provided, but the shape of the protrusion is not limited to this.

  Moreover, in the said 1st-7th embodiment, the blade part 110,120,210,220,301,401,510,520,810, on the upper surface of the stirring blade 100,200,300,400,500,800,1100. Although the embodiments 820 and 1101 are provided, the present invention may be applied to a stirring blade provided with blades on both the upper surface and the lower surface.

Eighth Embodiment
Next, a stirrer equipped with a stirrer according to an eighth embodiment of the present invention will be described.

  The stirring apparatus according to the eighth embodiment includes a stirring blade according to any one of the first to seventh embodiments and a stirring tank (not shown) in which the stirring blade is rotatably disposed and fluid is stored. Is equipped. Here, the fluid is not limited to washing water, and the stirring device of the eighth embodiment can be applied to stirring of any fluid.

  According to the stirring apparatus of the said structure, when the stirring blade arrange | positioned in a stirring tank rotates, the fluid in a stirring tank can be stirred effectively.

[Evaluation test of cleaning performance]
The inventor conducted a test while changing the screw size in order to evaluate the cleaning performance of the stirring blade according to the fifth embodiment. In this evaluation test, a stirring blade not provided with a screw is used as a comparative example, and 0.5 kg of laundry is rotated at 85 rpm for a predetermined time to measure and compare the cleaning rate, and 4.5 kg of laundry at 85 rpm It was rotated for a predetermined time to measure and compare the cleaning rate.

  The evaluation of the cleaning performance was performed according to the method of JIS Standard No. "JIS C 9606", and the cleaning rate was calculated from the reflectance of the contaminated cloth before and after cleaning.

  Here, the cleaning rate is a ratio of the degree of cleaning measured by each washing machine based on the degree of cleaning washed by the standard washing machine defined by the standard number "JIS C 9606" of JIS standard. . The laundry was carried out using five pieces of 100 g of test cloth (load 0.5 kg) or nine pieces of 500 g test cloth (load 4.5 kg).

  FIG. 30 shows the relationship between the ratio occupied by the screw in the evaluation of the cleaning performance and the ratio of the cleaning rate. In this graph, the horizontal axis represents the ratio occupied by the screw (screw diameter / diameter of the stirring blade), and the vertical axis represents the cleaning ratio (washing ratio of the stirring blade provided with the screw / stirring blade not provided with the screw) Represents the cleaning rate).

  According to this, the cleaning rate is enhanced by providing the screw up to a ratio of 0.5 for the screw, but the cleaning rate decreases rapidly when the ratio for the screw exceeds 0.5.

  More desirably, by setting the ratio occupied by the screw in the range of 0.18 to 0.32 at which an effect of 10% or more can be obtained at 0.5 kg, a clear improvement in the cleaning rate can be obtained.

  31 and 32 show detailed data used in the graph of FIG. This FIG. 31 shows the ratio of the washing ratio to the washing ratio at 0.5 kg of laundry, and FIG. 32 shows the ratio of the washing ratio to the washing ratio at 4.5 kg of laundry. Here, the diameter of the stirring blade is 400 mm.

  Although the specific embodiment of this invention was described, this invention is not limited to the said 1st-8th embodiment, It can change variously within the scope of this invention, and can be implemented. For example, a combination of the contents described in the first to eighth embodiments as appropriate may be used as an embodiment of the present invention.

  The present invention and embodiments are summarized as follows.

The stirring blade 100, 200, 300, 400, 500, 800 of the present invention is
Axially protruding blade portions 110, 120, 210, 220, 301, 401, 510, 520, 810, 820 disposed on at least one surface, and the blade portions 110, 120, 210, 220, 301, 401, 510 , 520, 810, 820, and includes a recess 102, 202, 502, 802 circumferentially adjacent to the stirring blade 100, 200, 300, 400, 500, 800 for stirring the fluid by rotation,
A plurality of projections, which are arranged at intervals in the radial direction on the front edge side in the rotational direction of the blades 110, 120, 210, 220, 301, 401, 510, 520, 810, 820, and in which the fluid collides It is characterized in that it has the sections 111, 121, 122, 211, 221, 311, 411, 511, 521, 811, 821.

  According to the above configuration, in front of the blade portions 110, 120, 210, 220, 301, 401, 510, 520, 810, 820 with which the fluid collides by the rotation of the stirring blades 100, 200, 300, 400, 500, 800 themselves. By providing the plurality of protrusions 111, 121, 122, 211, 221, 311, 411, 511, 521, 811, 821 on the edge side so as to be spaced apart in the radial direction, the respective protrusions 111, 121, Longitudinal vortices are formed downstream from 122, 211, 221, 311, 411, 511, 521, 811, 821. This longitudinal vortex generates lift for the fluid. The lift for the fluid is a force for suppressing the fluid flowing on the upper side of the vanes 110, 120, 210, 220, 301, 401, 510, 520, 810, and 820 so that the fluid does not separate at the downstream side. Thereby, by strengthening the flow of the fluid with a simple configuration, it is possible to more strongly stir the substance to be stirred which gets on the flow in the fluid.

  For example, the plurality of protrusions 111, 121, 122, 211, 221, 311, 411, 511, 521, 811, 821 may be blade portions 110, 120, 210, 220, 301, 401, 510, It is provided slightly upstream of the flow from the axial maximum height position 520, 810, 820, that is, at a position closer to one circumferential side from the maximum height position.

  A plurality of protrusions 111, 121, 122, 211, 221, 311, 411, 511 are provided on the front edge side in the rotational direction of the blades 110, 120, 210, 220, 301, 510, 520, 810, 820. , 521, 811, 821 are provided, but in the case of a stirring blade capable of forward rotation and reverse rotation, a plurality of protrusions are provided on the front edge side in the forward rotation direction of the blade during forward rotation and the blade during reverse rotation. A plurality of protrusions may be provided on the front edge side in the reverse rotation direction of the. The blade portion may be one or a plurality of raised portions disposed on at least one surface and protruding in the axial direction.

  The plurality of protrusions 111, 121, 122, 211, 221, 311, 411, 511, 521, 811, 821 are locations where the fluid strikes and contributes most to the stirring (the protruding blade portions 110, 120, 210, 220 , 301, 401, 510, 520, 810, and 820), and the fluid is provided to each protrusion 111, 121, 122, 211, 221, 311, 411, and so on. By forming a longitudinal vortex from the convex portion (protrusive portions 111, 121, 122, 211, 221, 311, 411, 511, 521, 811, 821) by bumping on 511, 521, 811, 821, new Kinetic energy (rotational energy) is given to the fluid to physically suppress separation from the blade portions 110, 120, 210, 220, 301, 401, 510, 520, 810, and 820, thereby flowing To strengthen the flow.

  In addition, with a stirring blade that agitates fluid by forward and reverse rotation, when a plurality of protrusions are provided on both the leading edge side and the trailing edge side in the rotational direction of the blade, fluid flow can be obtained in either rotational direction. It can strengthen.

Further, the stirring blade 200, 300, 400, 500, 800 of the present invention is
Axially protruding blade portions 210, 220, 301, 401, 510, 520, 810, 820 disposed on at least one surface and the blade portions 210, 220, 301, 401, 510, 520, 810, 820 Stirring blades 200, 300, 400, 500, 800, each of which has a circumferentially adjacent concave portion 202, 502, 802 and agitates a fluid by rotation,
The vanes 210, 220, 301, 401, 510, 520, 810, and 820 are spaced apart in the radial direction, and the plurality of protrusions 211, 221, 311, 411, and 511 with which the fluid collides are provided. , 521, 811, 821, and
The plurality of protrusions 211, 221, 311, 411, 511, 521, 811, 821 are the protrusions 211, 221, 311, 411, 511, 521 that are adjacent to each other from the inner side in the radial direction toward the outer side in the radial direction. , 811 and 821 are gradually narrowed.

  According to the above configuration, the blades 120, 210, 220, 220, 301, 401, 510, 520, 810, and 820 with which the fluid collides due to the rotation of the stirring blades 200, 300, 400, 500, and 800 are spaced in the radial direction. By providing a plurality of protrusions 211, 221, 311, 411, 511, 521, 811, 821 so as to line up, the downstream from each protrusion 211, 221, 311, 411, 511, 521, 811, 821 Vertical vortices are formed toward the This longitudinal vortex generates lift for the fluid. The lift for the fluid is a force that suppresses the fluid flowing on the upper side of the vanes 120, 210, 220, 301, 401, 510, 520, 810, and 820 so that the fluid does not separate on the downstream side. Thereby, by strengthening the flow of the fluid with a simple configuration, it is possible to more strongly stir the substance to be stirred which gets on the flow in the fluid.

  The plurality of protrusions 211, 221, 311, 411, 511, 521, 811, 821 are protrusions 211, 221, 311, 411, 511, which are adjacent to each other from the inner side in the radial direction toward the outer side in the radial direction. Stirring blades 200, 300, 400, 500 in a region where the average velocity of the fluid is large (radial outer side) and a small region (radial inner side) by gradually narrowing the intervals of 521, 811, 821. , 800 surface Reynolds number can be made constant. As a result, the action of the fluid on the stirring blades 200, 300, 400, 500, 800 is equalized, so that the water flow-up effect of the surfaces of the stirring blades 200, 300, 400, 500, 800 can be uniformly obtained.

Further, the stirring blade 200, 300, 400, 500, 800 of the present invention is
Axially protruding blade portions 210, 220, 301, 401, 510, 520, 810, 820 disposed on at least one surface and the blade portions 210, 220, 301, 401, 510, 520, 810, 820 Stirring blades 200, 300, 400, 500, 800, each of which has a circumferentially adjacent concave portion 202, 502, 802 and agitates a fluid by rotation,
The vanes 120, 210, 220, 301, 401, 510, 520, 810, and 820 are spaced apart in the radial direction, and the plurality of protrusions 211, 221, 311, and 411 with which the fluid collides are provided. , 511, 521, 811, 821,
The plurality of protrusions 211, 221, 311, 411, 511, 521, 811, 821 are directed radially outward from the inside in the radial direction, and the protrusions 211, 221, 311, 411, 511, 521, 811, 821 are provided. The size of is gradually decreasing.

  According to the above-described embodiment, the blades 120, 210, 220, 301, 401, 510, 520, 810, and 820 with which the fluid collides by the rotation of the stirring blades 200, 300, 400, 500, 800 themselves in the radial direction. By providing a plurality of protrusions 211, 221, 311, 411, 511, 521, 811, 821 so as to line up at intervals, each protrusion 211, 221, 311, 411, 511, 521, 811, 821 Vertical vortices are formed downstream. This longitudinal vortex generates lift for the fluid. The lift for the fluid is a force that suppresses the fluid flowing on the upper side of the vanes 120, 210, 220, 301, 401, 510, 520, 810, and 820 so that the fluid does not separate on the downstream side. Thereby, by strengthening the flow of the fluid with a simple configuration, it is possible to more strongly stir the substance to be stirred which gets on the flow in the fluid.

  Further, the plurality of protrusions 211, 221, 311, 411, 511, 521, 811, 821 are directed radially outward from the inner side in the radial direction to the outer portions 211, 221, 311, 411, 511, 521, 811. , 821 by gradually reducing the size of the stirring blades 200, 300, 400, 500, 800 in the region where the average velocity of the fluid is large (radial outer side) and small region (radial inner side). It becomes possible to make the Reynolds number of the surface constant. As a result, the action of the fluid on the stirring blades 200, 300, 400, 500, 800 is equalized, so that the water flow-up effect of the surfaces of the stirring blades 200, 300, 400, 500, 800 can be uniformly obtained.

Moreover, in the stirring blade 200, 400, 500, 800 of one embodiment,
Stirring blades 200, 400, 500, 800 for stirring the fluid by reverse rotation;
The plurality of protrusions 211, 221, 411, 511, 521, 811, 821 are provided on one of the front edge side or the rear edge side in the positive rotation direction of the blade portions 210, 220, 401, 510, 520, 810, 820. It is done.

  According to the above embodiment, in the agitating blades 200, 400, 500, 800 for agitating the fluid by forward and reverse rotation, the leading edge side in the forward rotation direction of the blade portions 210, 220, 401, 510, 520, 810, 820 Alternatively, by providing the plurality of protrusions 211, 221, 411, 511, 521, 811, 821 on one of the trailing edge sides, a complex fluid flow can be formed.

  For example, when the plurality of protrusions 211, 221, 411, 511, 521, 811, 821 are provided only on the front edge side in the positive rotation direction of the blade portions 210, 220, 401, 510, 520, 810, 820, positive rotation While the flow of fluid in the rotational direction is enhanced, in the reverse rotational direction, the flow of fluid is not enhanced, so it is possible to create different fluid flows depending on the rotational direction, and more complex fluid flow can be formed. In particular, in a washing machine using stirring blades 200, 400, 500, 800, such a complicated fluid flow makes the detergent and the like more likely to be dissolved, and the cleaning power can be improved.

Moreover, in the stirring blade 300 of one embodiment,
The blade portion 301 is one or a plurality of raised portions disposed on at least one surface and protruding in the axial direction,
The plurality of protrusions 311 are provided on the ridge line extending in the radial direction of the protrusion.

  According to the above-described embodiment, by providing the plurality of protrusions 311 so as to align on the ridge line extending in the radial direction of the raised portions as the blade portions 301, longitudinal vortices are formed downstream from each protrusion 311, This longitudinal vortex generates lift for the fluid. The lift for the fluid is a force that restrains the fluid flowing above the ridges so that they do not separate downstream. Thereby, by strengthening the flow of the fluid with a simple configuration, it is possible to more strongly stir the substance to be stirred which gets on the flow in the fluid.

  In the case of one raised portion in the stirring blade 300, the height gradually decreases while rotating from one end in the circumferential direction of the raised portion to the rotation center, reaches the concave portion 302, and further increases gradually while rotating. Become higher and continue to the other end in the circumferential direction of the raised portion. In the case of a plurality of raised portions in the stirring blade 300, the height gradually decreases while reaching the center of rotation from one raised portion of the plurality of raised portions, reaching the recessed portion 302, and further turning around. However, the height gradually increases and continues to other ridges of the plurality of ridges.

Moreover, in the stirring blade 400 of one embodiment,
The blade portion 401 is one or a plurality of raised portions disposed on at least one surface and protruding in the axial direction,
The plurality of protrusions 411 are provided at intervals along one of the circumferential directions with respect to a ridge line extending in the radial direction of the raised portion and along the ridge line.

  According to the above-described embodiment, by providing the plurality of protrusions 411 at intervals along one of the circumferential direction with respect to the ridge line extending in the radial direction of the raised part as the wing part 401 and along the ridge line Inverted rotation can create a complex fluid flow.

  In the stirring blade 400 according to the above-described embodiment, when there is one raised portion, the height gradually decreases while rotating from one end in the circumferential direction of the raised portion to the rotation center, reaches the recess 402, and further while rotating. The height gradually increases and continues to the other end in the circumferential direction of the raised portion. Further, in the stirring blade 400 according to the above embodiment, in the case where there are a plurality of raised portions, the height gradually decreases while reaching the center of rotation from one raised portion of the plurality of raised portions and reaches the recessed portion 402 Further, as it further goes around, the height gradually increases and continues to other raised portions of the plurality of raised portions.

Moreover, in the stirring blade 500, 800 of one embodiment,
The fluid flow generating units 600 and 900 are provided at the central portions of the stirring blades 500 and 800, and generate fluid flow in the vertical direction by rotating integrally with the stirring blades 500 and 800.

  According to the above embodiment, the fluid flow generating units 600 and 900 provided at the central portions of the stirring blades 500 and 800 generate fluid flow in the vertical direction by rotating integrally with the stirring blades 500 and 800. . As a result, it is possible to generate a fluid flow blown out from the center side of the stirring blade 500, 800, and reinforced by the plurality of protrusions 511, 521, 811, 821 provided on the blade portions 510, 520, 810, 820. Can further enhance the fluid flow.

  The fluid flow generating units 600 and 900 may be any propulsion device that generates a flow of fluid in the direction of the rotational axis, such as a propeller or a ribbon screw.

Moreover, the stirring apparatus of this invention is
The stirring blades 100, 200, 300, 400, 500, 800, and
The stirring blades 100, 200, 300, 400, 500, 800 are rotatably disposed, and are provided with a stirring tank 30 in which the fluid is stored.

  According to the above configuration, by the stirring blades 100, 200, 300, 400, 500, 800 arranged in the stirring tank 30, the fluid in the stirring tank 30 can be effectively stirred.

Moreover, the washing machine 1 of this invention is
It is characterized in that the above-mentioned stirring device is provided.

  According to the above configuration, the rotation of the agitating blades 100, 200, 300, 400, 500, 800 disposed in the agitating tank 30 strengthens the water flow in the agitating tank 30, and the agitating can be performed effectively. The washing on the inside can be stirred more strongly to improve the detergency.

  The present invention can be used for a stirring blade for stirring a fluid, a stirring device and a washing machine.

DESCRIPTION OF SYMBOLS 1 ... Washing machine 10 ... Outer box 11 ... Top plate 12 ... Base 13 ... Leg part 14 ... Laundry thing insertion opening 15 ... Top lid 20 ... Water tank 30 ... Stirring tank 30a ... Bottom wall 30b ... Peripheral wall 31 ... Dewatering hole 32 ... Balancer 40 ... Drive unit 41 ... Motor 42 ... Belt mechanism 43 ... Clutch and brake mechanism 44 ... Dewatering shaft 45 ... Agitating blade shaft 51 ... Connection pipe 60 ... Drain hose 61 ... Drain port 63 ... Seal holder 66 ... Drain space 67 ... Drain hole 68 ... Drain valve 70 ... Control unit 100, 200, 300, 400, 500, 800, 1100 ... Stirring blades 100a, 200a, 300a, 500a, 800a, 1100a ... Peripheral parts 102, 202, 502, 802 ... Recesses 103a, 103b, 203a, 203b, 503a, 503b, 803a, 803b ... ribs 104, 204, 304, 504, 804 ... small holes 106, 506 ... axial holes 110, 120, 210, 2 0, 301, 401, 510, 520, 810, 820, 1101 ... blade parts 111, 121, 122, 211, 221, 311, 411, 511, 521, 811, 821 ... projection parts 117, 127, 517, 527 ... Grooves 117a, 517a, 527a ... Open ends 118, 518, 528 ... Blades 130, 530 ... Bosses 240 ... Through holes 301a, 1101a ... First side walls 301b, 1101b ... Second side walls 301c, 1101c ... Upper walls 302, 402 , 1102: bottom portions 540, 840, 1140 ... screw storage portions 540a, 1140a ... openings 550, 850, 1150 ... shaft portions 550a ... keys 600, 900, 1200 ... screws 601, 901 ... cylindrical portions 601a, 901a ... shaft holes 601b, 901b ... key groove 602, 902 ... blade 602a, 902a ... leading edge 700, 1000 ... protective cover 01 ... dome portion 702 ... cylindrical portion 703 ... leg portion 703a ... engaging pawl 704 ... small holes 710 ... first protrusion 720: second protrusion 902b ... trailing edge

Claims (7)

An impeller having at least one surface disposed in an axially protruding blade portion and a recess circumferentially adjacent to the blade portion, and agitating fluid by rotation.
It has a plurality of protrusions which are provided on the blade portion so as to be spaced apart in the radial direction and which the fluid collides with,
The stirring blade is characterized in that a distance between the adjacent protruding parts is gradually narrowed from the inner side in the radial direction toward the outer side in the radial direction. An impeller having at least one surface disposed in an axially protruding blade portion and a recess circumferentially adjacent to the blade portion, and agitating fluid by rotation.
It has a plurality of protrusions which are provided on the blade portion so as to be spaced apart in the radial direction and which the fluid collides with,
The stirring blade characterized in that the size of the protrusion gradually decreases from the inner side in the radial direction toward the outer side in the radial direction. In the stirring blade according to claim 1 or 2,
The stirring vanes are characterized in that the plurality of projections are arranged at intervals in the radial direction on rising wall surfaces that are closer to the front edge side in the rotational direction from the maximum height position of the vanes. In the stirring blade according to claim 3 ,
An agitation blade for agitating the fluid by reverse rotation.
The stirring blade characterized in that the plurality of protrusions are provided on one of a front edge side and a rear edge side of the normal rotation direction of the blade portion. In the stirring blade according to claim 1 or 2 ,
The blade portion is one or a plurality of raised portions disposed on at least one surface and protruding in the axial direction,
The stirring blade is characterized in that the plurality of protrusions are arranged on ridge lines extending in a radial direction of the raised portion. A stirrer according to any one of claims 1 to 5 ;
And a stirring vessel in which the stirring blade is rotatably disposed and in which the fluid is stored. A washing machine comprising the stirring device according to claim 6 .